package com.luanye.enjoy.handler;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.luanye.enjoy.annotation.NotControllerResponseAdvice;
import com.luanye.enjoy.enums.ResultCode;
import com.luanye.enjoy.exception.APIException;
import com.luanye.enjoy.vo.RespBean;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

@RestControllerAdvice(basePackages = {"com.luanye.server.controller"})
public class ControllerResponseAdvice implements ResponseBodyAdvice<Object> {
    @Override
    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
        return !(returnType.getParameterType().isAssignableFrom(RespBean.class)
                || returnType.getMethod().isAnnotationPresent(NotControllerResponseAdvice.class))
                ;
    }

    @Override
    public Object beforeBodyWrite(Object data, MethodParameter returnType, MediaType selectedContentType, Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if (returnType.getGenericParameterType().equals(String.class)){
            ObjectMapper objectMapper = new ObjectMapper();
            try{
                return objectMapper.writeValueAsString(new RespBean(data));
            } catch (JsonProcessingException e) {
                throw new APIException(ResultCode.RESPONSE_PACK_ERROR);
            }
        }
        return new RespBean(data);
    }
}
